Lighting unit



FIG. 1 is a top-front perspective view of a first embodiment of a lighting unit, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top-front perspective view of a second embodiment of a lighting unit according to the invention;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a back elevational view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof. 

CLAIM The ornamental design for a lighting unit, as shown and described. 